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C. A. JACOBS.-

STEAM ENGINE. l No. 317,541. Y .Patented May 12,1885.

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N. van; rhmumegmpner. warmem. nc.

' UNITED STATES PATENT OFFICE.

CHARLES ARTHUR JAOOBS, OE TOLEDO, OHIO, ASSIGNOH rro BENJAMIN E.

MILLER AND WILLIAM w. BOwEs, OE SAME PLAOE.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 317,541, dated ,May 12, 1885.

Application tiled November 21, 1884. (No model.) I

Y To all whom it may concern:

consists in the improved construction and` Be it known that I, CHARLES A. JACOBS, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented a new and useful Improvement in Steam-Engines, of which the following is a specification, reference being .had to the accompanying drawings.

My invention relates to engines designed to be driven by either steam or water; and it has for its object to provide a machine of this character which shall possess superior advantages in point of simplicity, durability, inexpensiveness, and general efficiency.

With these ends in View the said invention novel combination of parts, as will be` hereinafter fully set forth, and particularly pointed out in the claims. L

In the accompanyingdrawings, Figure l is a longitudinal vertical section on the line w x, Fig. 2. Fig. 2 is a plan view of the same. Fig. 3 is a transverse sectional View on the line y y, Fig. 1. Fig. 4 is a detail horizontal section, taken through the parts of the cylinder, showing the slide-valve.

Like letters are used to indicate corresponding parts in the several figures. Referring to the drawings, A designates the cylinder, which is provided with externallythreaded open ends B B, and at its center is formed with a vertical integral partition, C. On opposite sides of the said partition the cylinder is provided with two straight ports, C O2, which communicate with the steam or water chest S. An exhaust-port, e, is located between the ports C C2, and is provided with an outlet, D, which may be curved down through the frame-work of the engine, as

-shown in Fig. 3, or extend in a vertical line down through the same.

F F designate the pistons, which work through the Open ends of the cylinder on opposite sides of the partition G, and are bored out so as to be made hollow. The outer ends of the pistons are left Open, while the inner ends are closed, so that the steam or water entering the cylinder through the respective ports C C2 may act against the closed ends of the pistons to work the latter forward.

vcylinder through the governor.

E is a connecting-rod, tothe ends of which the pistons are secured by jam-nuts. This rod'works in a passage bored through the par- Y said boxes being and at the same time allow free movement when in operation.

J designates the connecting-rod, secured at one end byawristpin, B3, to the crank-wheel B2 on the driving-shaft B6, and at the other end to thel piston F by a pin, B4. The rod O2 is connected at one end with an eccentric on the driving-shaft B6 to receive movement therefrom, and at the opposite end with a slide-valve, P, which moves in the steam or ports C O2, to alternately make communication between either of the ports and the exhaust-port e. v

It is optional in this class of engines Whether a governor be employed or not. I have illustrated one in the drawings; but it is not absolutely essential. When a governor is used, it is driven by a band, Z, connecting with. the drive-wheel, the water or steam entering the the water or steam enters directly through the water or steam chest S.

The operation of my invention will be readily understood from the foregoing description, taken in connection with the annexed draw- Ings.

It will be Observed that the steam or water in the chest S is caused to act al'ternatelyupon the inner ends of the pistons. By the peculiar connection of the latter on'e piston, F, is moving out under the action of the steam or water, while the other piston, F', is Working in to exhaust the steam from that end of the cylinder.-

It will be understood that the relative connection of the eccentric O2 and the connectingrod J is such that as the former moves backward to actuate the valve I and open the port C', and cause communication to be made be- Otherwise IOO' . 70' -water chest S (see Figs. 3 and 4) over the,l

tween port (l2 and the exhaust-port e, thelatter (rod J is moved forward to slide the pistons F F. By this action the steam or water from the chest enters the port C and acts upon the inner end of the piston F, while the steam or water within the other end of the cylinder is pushed or forced by the piston F through the port C2 and exhaust e out through the outlet D. In the forward movement of the ec' centric-rod O2 the action of the parts is just the reverse, the piston F exhausting through the port C, while the piston F is driven forward in the cylinder by the steam or water entering the port C2. In this construction of engines the water or steam plays uponthe inner ends of the plungers or pistons, and not upon the outer ends, as in other machines.

It will be observed that the stuffing-box G serves to prevent the steam or water passing from one end of the cylinder to the other. IIhe'partition C is perfectly solid, with the exception of the bore or passage in the center for the connecting-rod E to Work through. This connecting-rod may be fitted to the pistons, as shown; or it may be cast solid with the piston F', and the other piston F made with a threaded opening to screw on the rod. By extending these hollow pistons F Fout from the cylinder they form their own guides, and this, in connection with the stuffing-boxes Z m, enables the engine to work evenly` and with less friction and wear onthe parts.

In order to dene the nature, scope, and advantages of the present invention, I would have it understood that steam-cylinders with4 open ends are old; that hollow pistons are not broadly new, and that it is old to construct an engine with double pistons which are worked backward and forward in their respective cylinders, steam being supplied to one cylinder while it is being exhausted 4from the other cylinder.

Therefore, I lay no claim to either of these constructions, but base my improvement on the novel construction and combination of the several parts, whereby the engine is simplified and the working is made moreefcient in every respect. i

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-- l. The combination, with the cylinder A,. open at each end, and provided with a partition, C, cast integral therewith at the center, of

the hollow pistons F F, working inthe cylinder lon each side of the partition, and extended beyond'the open ends of the cylinder, a connecting-rod, E, working in a passage provided through the partition and connecting the two pistons together, a Ysteam or water chest, S, ports C C2, communicating with the latter, and opening into the cylinder on opposite sides of 'the partition, the slide-valve P, and the exhaust-port located between the ports C G2, fr the purpose set forth.

2. The cylinder A, open at each end, and provided with a central partition, (l, in combination with the pistons F F', working in the cylinder on each side of the partition, a rod, E, connecting the pistons and working in a passage provided through the partition, the steam or water chest, slide-valve, the steamports C 02,' affording communication between the steam-chest and the cylinder on opposite sides of the partition, and the exhaust-port e, located between the steam-ports, whereby the steam is caused to act against one piston in one section of the cylinder and to be exhausted by the other piston from the other section thereof, for the purpose set forth.

3. The cylinder A, open at cach end, and

provided with a partition, C, cast integral therewith, in combination with the hollow pistons F F', working in the cylinder on each side of the partition, and extended beyond the open ends of the cylinder, the inner ends of the pistons being closed, the rod E, connecting the pistons, and working in a passage provided through the partition, a stuffing-box, G, fitting in the latter around the connectingrod, stufhng-boxes Z m, screwing over the threaded ends B B of the'cylinder, and reduced in diameter at the outer ends to fit the pistons and act as guides therefor, the steam or water chest S, the slide-valve P, the ports C O2, opening into the cylinder on opposite sides of the partition, an exhaust-pipe, e, located between the ports C G2, and an outlet, D, for the exhaust-port, for 'the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature Io I Witnesses:

II. J. RAFFENSPERZE, E. P. RAYMOND. 

